Results 11 to 20 of about 153,685 (298)
Adaptive stochastic parallel gradient descent approach for efficient fiber coupling
Optics Express, 2020 In high-speed free-space optical communication systems, the received laser beam must be coupled into a single-mode fiber at the input of the receiver module. However, propagation through atmospheric turbulence degrades the spatial coherence of a laser beam and poses challenges for fiber coupling.
Qintao, Hu +5 more
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Results in Physics, 2019 We propose a model of the fiber coupling efficiency for a partially coherent collimating laser beam propagating through turbulent biological tissue to fiber.
Qiyong Liang +5 more
doaj +1 more source
Applied Sciences, 2019 A high-efficiency coupling method using the gradient-index (GRIN) fiber probe and hollow-core photonic crystal fiber (HC-PCF) is proposed to improve the response time and the sensitivity of gas sensors. A coupling efficiency model of the GRIN fiber probe
Chi Wang +5 more
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Highly efficient optical power transfer to whispering-gallery modes by use of a symmetrical dual-coupling configuration [PDF]
, 2000 We report that greater than 99.8% optical power transfer to whispering-gallery modes was achieved in fused-silica microspheres by use of a dual-tapered-fiber coupling method.
Cai, Ming, Vahala, Kerry
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Investigation on the Coupling of Vortex Beam Into Parabolic Fiber in Turbulent Atmosphere
IEEE Photonics Journal, 2019 Aiming at the demand for high-capacity wireless-fiber link, the coupling efficiency of Laguerre Gaussian (LG) vortex beam into parabolic fiber under atmospheric turbulence is first investigated.
Lin Yu, Yixin Zhang
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Photonics, 2022 Symmetric narrow waveguide structure has been developed and fabricated to achieve low beam divergence and improved coupling performance of the 1.95 μm GaSb-based single-transverse-mode diode lasers.
Tianfang Wang +9 more
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Wavelength-independent coupler from fiber to an on-chip cavity, demonstrated over an 850nm span [PDF]
, 2007 A robust wide band (850 nm) fiber coupler to a whispering-gallery cavity with ultra-high quality factor is experimentally demonstrated. The device trades off ideality for broad-band, efficient input coupling.
Carmon, Tal +3 more
core +1 more source
Characteristics of Coupling Degradation Tolerances for Single-Mode Optical Fiber [PDF]
Engineering and Technology Journal, 2009 The coupling tolerances is considered as an important parameters for the opticaldesigner and it can not be ignored. Since the coupling efficiency is affected by thedisplacement of the optical components during the thermal expansion and theassembling ...
Ali H. Al-Hamdani +2 more
doaj +1 more source
Efficient fiber coupling of down-conversion photon pairs [PDF]
Physical Review A, 2004 15 pages, 4 ...
openaire +2 more sources
Ultralow-threshold microcavity Raman laser on a microelectronic chip [PDF]
, 2004 Using ultrahigh-Q toroid microcavities on a chip, we demonstrate a monolithic microcavity Raman laser. Cavity photon lifetimes in excess of 100 ns combined with mode volumes typically of less than 1000 µm^3 significantly reduce the threshold for ...
Armani, D. K. +3 more
core +1 more source